Doctors

Internal Medicine • Hannibal, MO

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About

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Clinic Type

Internal Medicine

Address

Internal Medicine - Hannibal, 100 Medical Drive, Hannibal, MO 63401

Phone

%28573%29231-3271

Email

DenmanMedical@denserv.com

Opening Hours

Not published — contact the clinic to confirm hours.

Website

https://www.blessinghealth.org/doctors?blessing=1&page=3&proximity=hannibal%2C+mo&sort=dist

Services Offered

Internal Medicine
Geriatric Care

Team

Clay Thornburg — DNP, AGNP-BC
Christina Remmert — DO

Insurance & Payment

—

Languages Spoken

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Social Media

Twitter Youtube Facebook Linkedin Instagram

Photos

What Patients Say

Overall sentiment across review platforms: mixed

Healthgrades (Dr. Tanya Sellers-Hannibal): 4.0 out of 5 stars (5 ratings)
BirdEye (Dr. Matthew D. Hannibal): 4.9 out of 5 stars (255 reviews)
BirdEye (Clarity Healthcare, Hannibal): 4.0 out of 5 stars (8 reviews)

Patients praise

Professional and knowledgeable doctors
Effective and positive surgical or treatment outcomes
Staff helpfulness in administrative/billing matters when resolved
Good bedside manner and willingness to listen to patient concerns

Common complaints

Billing and payment process concerns
Perceived lack of time spent with patients or rushing visits
Rude or unhelpful front-desk and reception staff
Disappointment in diagnosis or lack of clarity regarding care plans

"The doctor was very patient and listened patiently to my concerns. I would definitely recommend Dr. Hannibal."

— BirdEye (Dr. Matthew D. Hannibal)

"BEWARE!! BEWARE!! BEWARE!!... I tell her I thought these visits were follow up and I couldn’t believe I am being charged for pickup when Dr Sellers didn’t do anything."

— Healthgrades (Dr. Tanya Sellers-Hannibal)

"She had no problems prescribing meds, but talking to a child for 15 minutes and then giving them medicine without knowing what they are dealing with... is careless and dangerous."

— BirdEye (Clarity Healthcare, Hannibal)

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].